Name	Info	Provider	Link
	free resource	Optica Publishing Group	https://opg.optica.org/abstract.cfm?URI=oe-22-5-5216
	free resource	Bicocca Open Archive UniMiB (BOA)	https://hdl.handle.net/10281/348046
	free resource	scite Smart Citations	https://scite.ai/reports/24663861